mirror of
https://github.com/holub/mame
synced 2025-04-26 10:13:37 +03:00
98 lines
2.1 KiB
Lua
98 lines
2.1 KiB
Lua
local datfile = {}
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function datfile.open(file, vertag)
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local data = {}
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local ver
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local filepath
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local fh
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for path in mame_manager:ui():options().entries.historypath:value():gmatch("([^;]+)") do
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filepath = lfs.env_replace(path) .. "/" .. file
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fh = io.open(filepath, "rb")
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if fh then
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break
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end
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end
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if not fh then
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return nil
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end
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do
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local inblock = false
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local buffer = fh:read("a")
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if vertag then
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local match = buffer:match(vertag .. "%s*([^%s]+)")
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if match then
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ver = match
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end
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end
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local function gmatchpos()
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local pos = 1
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local function iter()
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local spos, epos = buffer:find("\n$", pos, true)
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if not spos then
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return nil
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end
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spos = spos + 1
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local spos, epos, match = buffer:find("([^\n]+)", spos)
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pos = epos + 1
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return match, pos, iter
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end
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return iter
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end
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for line, epos, iter in gmatchpos() do
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local flag = line:sub(1, 1)
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if flag ~= "#" then
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if flag == "$" then
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if line:sub(1, 4) == "$end" then
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inblock = false
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elseif not inblock then
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local tag, set = line:match("^%$([^%s=]+)=?([^%s]*)")
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if set and set ~= "" then
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local tags = {}
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local sets = {}
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local tag1 = ""
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tag:gsub("([^,]+)", function(s) tags[#tags + 1] = s end)
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set:gsub("([^,]+)", function(s) sets[#sets + 1] = s end)
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repeat
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tag1, epos = iter()
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until tag1:sub(1, 1) == "$"
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tag1 = tag1:match("^$([^%s]*)")
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if not data[tag1] then
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data[tag1] = {}
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end
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for num1, tag2 in pairs(tags) do
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if not data[tag1][tag2] then
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data[tag1][tag2] = {}
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end
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for num2, set in pairs(sets) do
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data[tag1][tag2][set] = epos
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end
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end
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end
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inblock = true
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end
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end
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end
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end
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end
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fh:close()
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fh = io.open(filepath, "r")
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local function read(tag1, tag2, set)
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local output = {}
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if not data[tag1][tag2][set] then
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return nil
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end
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fh:seek("set", data[tag1][tag2][set])
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for line in fh:lines() do
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if line == "$end" then
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return table.concat(output, "\n")
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end
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output[#output + 1] = line
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end
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end
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return read, ver
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end
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return datfile
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